How can a dishwasher have a UI? Mine does. It's got a flat buttons on the front, so it's easy to lean on it and push one accidentally. So my wife likes to turn on "control lock", so that doesn't happen. Fine so far.
To turn off "control lock", you hold it for 3 seconds. The fail? There is no indication when you've held it long enough.
*press* One thousand one, one thousand two, one thousand *release*. Press Start. blinking control lock no-no light again! GRRRRRrrrrrrr!